The GH axis & GHSR

The control system ipamorelin plugs into

Growth hormone is not released on command at a constant rate. It is governed by a tug-of-war between two hypothalamic signals, a release signal and a brake, and it comes out in sharp bursts, mostly during deep sleep. Ipamorelin works by pressing on a third, parallel input to that system.

This unit walks the growth-hormone axis from the top down: the receptor ipamorelin binds, the signaling cascade inside the pituitary cell, why the pulsatile pattern matters, and where this receptor is found in the body beyond the pituitary.